<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>demo</title>
  <link rel="stylesheet" href="demo.css">
  <style>
    .rabbit{
      background-image: url('./frame_animation_1.png');
    }
  </style>
</head>
<body>
  <div id="rabbit" class="rabbit"></div>
  <script src="demo.js"></script>
</body>
</html>